Visual cue spatial context affects performance of anticipatory postural adjustments

IF 1.6 3区心理学 Q4 NEUROSCIENCES Human Movement Science Pub Date : 2024-03-25 DOI:10.1016/j.humov.2024.103210

Jenna Pitman , Julia Shannon , Michael J. MacLellan , Lori Ann Vallis

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Abstract

Past research indicates that anticipatory postural adjustment (APA) errors may be due to the incorrect selection of responses to visual stimuli. In the current study we used the Simon task as a methodological tool to challenge the response selection stage of processing by presenting visual cues with conflicting spatial context; in this case generating a step response to a left pointing arrow which appears to the participant's right side or vice versa. We expected greater mediolateral APA errors, delayed APA and step onset times, and greater lateral CoP displacement prior to stepping for visual cues with incongruent spatial contexts compared to cues with congruent. Thirteen healthy young adults completed step initiation trials (n = 40) from a force platform while whole-body kinematic motion was tracked. Participants were presented with arrows pointing to the left or right, indicating to step with the left or right limb, respectively. These arrows were presented on the same side as the desired step direction (congruent) or the opposite side (incongruent). Results revealed that incongruent trials resulted in significantly more incidences of mediolateral APA errors and greater mediolateral CoP deviations during the APA compared to congruent visual cue context trials. No effects were observed for the temporal outcomes, suggesting that young adults can maintain temporal execution of steps despite these motor control errors. This study demonstrates that the spatial context of visual information significantly impacts the success of response selection processes during step initiation, furthering our knowledge of how humans integrate visual information to initiate whole body movement.

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视觉线索空间环境影响预期姿势调整的表现

过去的研究表明，预期姿势调整（APA）错误可能是由于对视觉刺激的反应选择不正确造成的。在当前的研究中，我们将西蒙任务作为一种方法工具，通过呈现具有空间背景冲突的视觉线索来挑战处理过程中的反应选择阶段；在这种情况下，对出现在受试者右侧的指向左侧的箭头或反之亦然，受试者会产生迈步反应。我们预计，与空间背景一致的视觉线索相比，空间背景不一致的视觉线索会产生更大的内外侧APA误差、延迟的APA和迈步开始时间，以及迈步前更大的外侧CoP位移。13 名健康的年轻成年人从力平台上完成了起步试验（n = 40），同时对他们的全身运动进行了追踪。参与者会看到指向左侧或右侧的箭头，分别表示用左肢或右肢迈步。这些箭头出现在所需迈步方向的同一侧（一致）或相反一侧（不一致）。结果显示，与视觉线索背景一致的试验相比，不一致的试验导致内外侧APA错误发生率明显更高，APA过程中内外侧CoP偏差也更大。在时间结果上没有观察到任何影响，这表明尽管存在这些运动控制错误，青壮年仍能在时间上保持步法的执行。这项研究表明，视觉信息的空间背景会显著影响步法启动过程中反应选择过程的成功与否，从而进一步加深了我们对人类如何整合视觉信息以启动全身运动的了解。

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来源期刊

Human Movement Science 医学-神经科学

CiteScore

3.80

自引率

4.80%

发文量

审稿时长

42 days

期刊介绍： Human Movement Science provides a medium for publishing disciplinary and multidisciplinary studies on human movement. It brings together psychological, biomechanical and neurophysiological research on the control, organization and learning of human movement, including the perceptual support of movement. The overarching goal of the journal is to publish articles that help advance theoretical understanding of the control and organization of human movement, as well as changes therein as a function of development, learning and rehabilitation. The nature of the research reported may vary from fundamental theoretical or empirical studies to more applied studies in the fields of, for example, sport, dance and rehabilitation with the proviso that all studies have a distinct theoretical bearing. Also, reviews and meta-studies advancing the understanding of human movement are welcome. These aims and scope imply that purely descriptive studies are not acceptable, while methodological articles are only acceptable if the methodology in question opens up new vistas in understanding the control and organization of human movement. The same holds for articles on exercise physiology, which in general are not supported, unless they speak to the control and organization of human movement. In general, it is required that the theoretical message of articles published in Human Movement Science is, to a certain extent, innovative and not dismissible as just "more of the same."